(Eugene, OR)  --  A plaque of President Barack Obama is being moved from a Eugene park to a "more secure location" after being vandalized a number of times.  The Eugene Register-Guard reports the plaque has been a target of vandals since the Nobel Peace Park opened last year to honor winners of the Nobel Peace Prize.  Obama received the prize in 2009.  Officials say most of the vandalism was written on the plaque with a marker and was easy to remove, but the latest vandalism was a profanity that was carved into the plaque.